runqueue: Drop deadlock breaking force fail
    
    I'm 99% certain this failing of a scenequeue task corrupts runqueue and
    causes all kinds of breakage. I'd rather runqueue deadlocked than corrupted
    and did weird things so drop this code.
    
    We've seen builds where the deadlock triggers and it then tries to run tasks
    where the SQ task already ran with very confusing failures. It is likely it
    is this code causing it.
    
    Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>